.active{
    background-color:blue;
}
.show{
    display:none;
}
*{
    padding:0;
    margin:0;
}
ul{
    background-color:white;
    list-style: none;
    display:flex;
    position:fixed;
    bottom:0px;
    left:0px;
    height:50px;
    line-height:50px;
    width: 100%;
}
ul li{
    flex: 1;
    text-align:center;
}
.activea{
    color:red;
}

dl{
    height:50px;
    border-bottom:1px solid gray;
};
dl dt{
    font-size: 20px;
}
dl dd{
    font-size: 12px;
    color:gray;
}

input{
    width:100%;
    height: 50px;
    line-height:50px;
    font-size: 30px;
}
